aws: add example of getting value from Secrets Manager

DevOps/AWS/AWS_Lambda/Accessing_secrets_from_a_Lambda.md

@@ -35,4 +35,6 @@ Here is an example of a resource permission giving access to a Lambda:
 }
 ```
 
+See [Fetch from Secrets Manager](/DevOps/AWS/AWS_Lambda/Code_examples/Fetch_from_Secrets_Manager.md) for a code example of retrieving a value from Secrets Manager.
+
 // TODO: Add link to code example

DevOps/AWS/AWS_Lambda/Code_examples/Fetch_from_Secrets_Manager.md

@@ -1,3 +1,39 @@
-// TODO: Add example code of retrieving a value from SecretsManager
+---
+categories:
+  - DevOps
+tags: [AWS, backend]
+---
+
+# Fetch from Secrets Manager
+
+## TypeScript
+
+```ts
+const getSecret = async (): Promise<SomeCredentials> => {
+  const secretsManager = new AWS.SecretsManager();
+  const response = await secretsManager
+    .getSecretValue({ SecretId: process.env.SECRET_ARN as string })
+    .promise();
+  const secretValues = JSON.parse(response.SecretString as string);
+
+  if (secretValues) {
+    return {
+      accessToken: secretValues.POCKET_ACCESS_TOKEN,
+      consumerKey: secretValues.POCKET_CONSUMER_KEY,
+    };
+  } else {
+    throw new Error("Failed to return Pocket credentials");
+  }
+};
+
+type SomeCredentials = {
+  accessToken: string;
+  consumerKey: string;
+};
+```
 
 // TODO: Add example of deferring to local env var
+
+## Python
+
+// TODO: Add Python example